Alfred berney



ALFRED BERNEY, OF B UNITED STATES PATENT ()FFICE.

OSTON, MASSAOHUETTS, ASSIGNOR TO NATHIEL A.

DUTTON, OF 'SAME PLAGE. i

* PROCESS OF PREPARING ANTHRACITE WASTE, &c., FOR COMBUSTION.

SPECIFICATION forming part of Letters Patent No. 239,642, dated April 5,1881. Application filed July 21, 1.880. (No model.)

To all whom it may concern Be it known that I, ALFRED BERN-EY, a citizenof the United States,residing in the city of Boston, county of Suffolk,and State of Massachusetts, have invented certain new and usefulImprovements in the Preparation of Anthracite Goal Dust, Waste, orScreenings,

so that it may be more economically consumed; and I do hereby declarethat the following is a full, clear, and exact description of theinvention, which will enable others to use it.

Heretofore anthracite coal dust, waste, or screenings has been preparedfor combustion by means of mixing it with tar, pitch, and divers othermaterials and compressed into forms at much expense, labor, and trouble,and when burned alone required a strong blast and mixing with bituminouscoal, either of which add to the expense of its consumption.

The object of my invention is to prepare the waste coal screenings bythe simple process described, so that as it is shoveled into the fire itwill coke or adhere into masses, and thus burn as bituminous coal does,by which means a strong draft, that is necessary to aid initscombustion, can be made without the liability to carry too much of itthrough the fines and be wasted out of the stack; also down through thegrate-bars. The efiect of this process will be to enable others to usewaste coal screenings in place of large coal, and save much expense.

To carry my invention into practical effect, I mix with one ton ofanthracite coal dust or waste four quarts of pulverized lime, potash, orsoda, and eight gallons of pulverized asphalt, rosin, tar, or pitchofany kind, or liquid tar. To these I add sufficient water to saturatethe waste. After it is. prepared it must be placed into a heatedfurnace, in the corners, along the sides or center, in brickshapedmasses, so that the materials will coke together by the action of theheat. (For that purpose I use a coking-shovel made in brickshape form.)The lime and tarry substance released by the heat unites or cokes thewaste.

I do not confine myself to the exact proportions herein stated, as theymay be varied somewhat aud not depart from the spirit of my invention.

What I desire to claim ters Patent is The process of coking or unitinganthracite waste or screenings, which consists in mixing the same withpowdered lime or soda and asphalt or tar and Water, then passing it intoa heated furnace, to be solidified with heat and consumed, allsubstantially as described.

and secure by Let- ALFRED B ERNEY.

Witnesses:

W. G. AnAus, JAMES B. WILLIAMS.

